Diamond polishing adjusting device



et 131, 1949. M J, LEIMAN 2,484,574-

DIAMOND POLISHING ADJUSTING DEVICE Filed July 10, 1947 j Z f/MAM H15 TTORME Patented Oct. 11, 1949 2,484,574 DIAMOND POLISHING ADJUSTING DEVICE Marcel J. Leiman, Brooklyn, N. Y. Application July 10, 1947, Serial No. 759,981

3 Claims.

This invention relates to diamond grinding devices, and has for its main object to provide improved means for setting the diamond in the two desired directions for the angle of the face to be ground, and for the grain along which the grinding is to be done, which two settings to-day require either an elaborate complicated device, orv are arrived at by a great number of tedious, time consuming, trials and tests.

Another object of this invention is to provide a device as indicated hereinbefore, which will be readily adapted to be inserted into the equipment used at present by diamond grinders.

Still other objects of this invention will be apparent as the specification of the same proceeds, or will be pointed out therein, and, among others, I may mention: to provide a device of the character mentioned, which will be simple in construction, inexpensive to manufacture, easy to apply and use, readily and completely fitting into hand operating grinding methods involving no change in the operation of hand grinding, with the exception of the great advantage in the novel setting of the two angles through my invention.

In the drawings forming a part of this specification and accompanying the same:

Fig. 1 is a side view of a usual diamond grinding arm, or tong as it is called in this art, showing my invention applied thereto;

Fig. 2 is a fragmentary front view thereof, as indicated by the arrow 2 in Fig. 1, and on a larger scale than Fig. 1;

Fig. 3 is a sectional view thereof, the section being taken on the line 33 of Fig. 2 and being on a still larger scale.

Referring now to the drawings, more in detail by characters of reference, the numeral ll) indicates a usual grinder arm or tong as used by the diamond grinders to-day, the same havingadjustable legs I l, by which the inner end thereof may rest on an appropriate support, like a working table 42, while at the outer end thereof it carries the usual diamond receiving chuck l3, called' in the trade the dop.

The diamond is indicated at I4, secured in said chuck, as it is well known and as it will be explained hereinafter, and is engaged by the rotating grinder disk or wheel l5.

As has been indicated hereinbefore, the tong l and the dop I3 are the usual devices now used by diamond grinders. However, diamond grinders now have a different way of securing the dop l3 at the outer end 16 of the tong than the one illustrated herein and invented by me.

To-day the diamond grinders simply have a flexible, but still considerably resistant, copper rod or heavy wire instead of a rigid, stiff, steel or similar rod ll, shown in my device. The copper rod now used by the diamond grinders will be secured into the outer end It of the tong Ill in any appropriate manner, and so will be my rigid pin or rod ll, one method of which is shown in the drawing, and will be obvious to those versed in this art, by inspecting the same.

The outer end I6 of the tong is forked or slotted, the two parts being adapted to move against one another, and such a movement being executed by an adjusting screw device I8, as will be understood. The copper rod, or my rod ll, will be caught and pressed between the fork ends of the tong l6, and so secured in a desired position, but it may be adjusted upwardly or downwardly by releasing the screw 18 and moving the rod l'l upwardly or downwardly as desired, and then tightly locking it between the two parts of the tong end [6. 'In this manner the rod Il may be adjusted upwardly or downwardly and secured in any desirable position.

The supporting legs I l two of them being used at the two sides of the inner end ill of the tong,-

will also be adjusted as to height, and secured in their position, as by the set screws 20, first, however, the tong Ill being carefully levelled, both, in the longitudinal and in the transverse directions, all this being well known to those versed in this art.

The diamond grinding will be executed by the grinder holding the tong l0 in its adjusted position.

As it is also well known, the diamond l4 must be adjusted as to its position, angularly, both vertically and horizontally. By its adjustment through rotating on a horizontal axis, the angle of the grinding can be set, while an adjustment thereafter horizontally, by rotating on a vertical axis, isnecessary to find the so-called grain of the diamond, and to set it according to the direction of the grain.

At present, the grinder simply bends the flexible copper rod, called in this art, the stalk, which is in the position of my rigid rod ll and directly carries the dop it at its lower end, as by its lower end being screw threaded, and the dop having a screw threaded socket or nut 20 secured thereon. By such bending in the desired direction, the grinder first sets the angle of grinding, that is, the angle of the surface to be ground to the vertical axis of the device, and then he sets the direction of grinding for the grain by another bending of'the copper; rod. Itwill be obvious,;.and"it-issa;

3 fact, that practically numberless trials are necessary, and back and forth bendings, before the right position of the diamond with respect to the angle to be ground, and the direction in which the diamond is to be ground, is finally attained.

According to my invention, a rigid, non-flexible, rod ll will be secured in an adjustable manner into the slotted or forked end l6 of the usual tong, but a novel adjusting device, generally indicated by the numeral 12 lyvvi-ll belinterposed between the rod I1 and the dop I3, said device 21 permitting an easy and accurate adjusting of the dop in the two desired directions, that is, permitting the rotation of the dop on a horizontal axis, whereby the angle of the surface to be ground can be set, and then permitting a rotation of thedop, without disturbing its horizontal angular setting, around the rod ll, or on a vertical axis, whereby the diamond, after one or two trials, is set to The best direction for grinding with the grain.

Inrmy double adjusting "device 2.1.,"110ri-Z0nt31zpin 22 will be secured ;at :the lower end of the .rod H, as by having :a vertical b10168 "23 through which said rod .may pass, and it will .be adapted :to be secured in :any desired position (on the ro1:l:by the set screw :24.

Asleeve .25 is rotatable around the'middle portion :of the pin .22, the inner end of said sleeve carrying a vertical plate element .25 secured thereon, as by welding but permitting a :rotation of the same on the horizontal pin'ZZ.

The vertical plate 1% is continued :in .a horizontal plate EE the twozformi-ngnnrangular member rotatable with the sleeve 25., and thediamon'd chuck order) srisrsecuredtonsaid horizontal plate 25a in a removable manner ,zby :any appropriate means, well known in this The means indicated in the figures are a screw :2?! secured into said horizontal plate 26a and adapted to he threaded into the nut :or socket which usually is provided on the dop l3 :and is a, part thereof. Indeed, normally there are two such receiving sockets or nuts 26 on a dopzso :as to permit the dop to be secured at the lower end of a rod I! in two different positions, as desired.

A cross pin :28 is provided .acrossithe horizontal pin :in front of the vertical plate 26 thereby providing an inner limit for the rotating sleeve '25. The outer =end'22a of the horizontal pin 22 is screw threaded and a ikrrurle'd sleeve nut T29 is threaded thereon, and it will be seen that by rotating the sleeve .nut 29 in one direction, the same will :advance and will press the sleeve 25 against the cross pin 28 thereby locking the same against rotation. To further secure the sleeve $55 in its inner position, .a set screw 30 may !be employed.

The diamond I4 .is set in the dop or clutch 1'3 in any of the usual'manners'the one shown in the drawings comprising two pivoted arms 31, which are movable inwardly or outwardly; simultaneously, as by the operating-screw 32, and they will either release the diamond or clamp it between their inner ends. This device is well known in the art.

The use and operation of my invention will practically be obvious from the hereindescription, butI want to offer the following further explanations relating thereto.

After the diamond is secured in the dop l3, the

two angles thereof have to be adjusted, and first the operator will turn the sleeve nut or knob '29 in an opposite direction to the one where the sleeve 25 was '1ocked,'first, of course, releasing the set screw =30. After knob "29 thus loosens the sleeve 25, the "angle plate 26,2611, will Zbeturned in on a vertical aXis around pin ll, to find the "grain of the diamond.

.Flor this purpose the set screw 24 will be released so as to permit a horizontal rotation of the pin 22 and all the devices associated therewith, like the angle plates 26, Zfia, and the dop l3. Indeed, as a rule, the set screw 24 will be set with a moderate but reliable pressure on the vertical rod I 7, so as to permit a rotation of the described devices on a vertical .axis, that is,

around the .pin -11, but still have friction enough to retain the said devices any position .arrived at.

In the embodiment shown, .an inner pressing head 33 is empl'o" pressed outwardly to be used with any other dop and securing means for the diamond than the one described. 80, for instance, it is readily adapted to be used for the so-called industrial diamond dop.

While I have shown a prefer-red embodiment of my invention, it is 'to be understood that changes and variations may he resorted to in the elements, combinations and operation of my invention, and I reserve 'my rights to such changes and variations as are within the spirit of this specification, and the scope of the claims hereunto appended.

What I claim as new and want to protect by Letters Patent of the Unitedstat'es, is:

'1. In a device for adjusting a diamond for the two angles required :in the usual grinding thereof, said device having a dop into which the diamond is secured and a tong by the use of which the diamond is ground, said tong having a substantially vertical rigid stalk at the outer or grinding end of the tong, means to upwardly and downwardly adjust said stalk in said tong, the combination, of a horizontal pin rotatable around said stalk, a sleeve rotatable on said pin, an angular plate having a vertical and a horizontal leg, the vertical leg thereof being secured on said sleeve and rotatable therewith, and means to secure said dop 'on the horizontal leg thereof whereby said dop with the diamond therein may be rotated in the axis or" the stalk or on an axis perpendicular thereto.

'2. In a device for adjusting a diamond for the two angles required in the usual grinding thereof, said device having a dop into which the diamond is secured and a tong by the use of which the downwardly adjust said stalk in said tong,

combination, of a horizontal pin rotatably seat opposite to the set screw 24; y a spring 34 to insurea yielding but still re-liable frictional securing of parts cured at the lower end of said stalk, a sleeve rotatable on said horizontal pin, an inward limit on said horizontal pin for said sleeve, the outer end of said horizontal pin being screw threaded, a screw threaded nut engaging said outer end whereby said rotatable sleeve may be pressed against said limit and so secured in its position, or may be released and permitted to rotate, an angle plate having a vertical and a horizontal leg and being secured on said sleeve by its vertical leg, a screw projecting from its horizontal leg, and a screw threaded nut secured on said dop whereby said dop may be secured on said screw.

3. In a device, as set forth in claim 2, said horizontal pin being upwardly and downwardly slid- 15 2 3 1 The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 605,193 Stern et a1. June 7, 1898 631,562 Cooper Aug. 22, 1899 774,383 Farrell Nov. 8, 1904 1,415,118 Ries May 9, 1922 Rosner Aug. 28, 1945 

